👉 Washing math involves calculating how many loads of laundry are needed to fully clean a load, based on factors like the fabric type, soil level, and detergent effectiveness. The process typically starts by determining the load's "stain load," which is a weighted average of the dirtiness of each item. For example, a heavily soiled shirt might have a higher weight than a clean one. The detergent's cleaning power is also factored in, often measured in grams per square meter (GSM). A common rule of thumb is to use about 15-20 grams of detergent per square meter for a full load. By dividing the total stain load by the detergent's effectiveness, you can estimate the number of loads needed. For instance, if a load has a 50 GSM stain load and the detergent is 20 GSM effective, you'd need about 2.5 loads (50 / 20 = 2.5). Since you can't do half a load, you'd round up to 3 loads. This method ensures efficient use of detergent and water, optimizing both cost and environmental impact.
